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-rw-r--r--csc/match.csc80
1 files changed, 0 insertions, 80 deletions
diff --git a/csc/match.csc b/csc/match.csc
deleted file mode 100644
index 4db0d07..0000000
--- a/csc/match.csc
+++ /dev/null
@@ -1,80 +0,0 @@
-(define-library (csc match)
- (export
- define-match-record-type
- match)
- (import (scheme base))
- (begin
-
-
- (define-record-type <no-match>
- (make-no-match)
- no-match?)
-
-
- (define *no-match* (make-no-match))
-
-
- (define-syntax define-match-record-type
- (syntax-rules ()
- ((define-match-record-type name constructor predicate matcher (field-name* field-getter*) ...)
- (begin
- (define-record-type name
- constructor
- predicate
- (field-name* field-getter*) ...)
- (define (matcher x)
- (unless (predicate x)
- (raise *no-match*))
- (list (cons '!type 'name) (cons 'field-name* (field-getter* x)) ...))))))
-
-
- (define-syntax match-pattern
- (syntax-rules (% _ quote when)
- ((match-pattern x pattern when condition result result* ...)
- (match-pattern x pattern
- (unless condition
- (raise *no-match*))
- result result* ...))
- ((match-pattern x _ result result* ...)
- (let () result result* ...))
- ((match-pattern x (quote constant) result result* ...)
- (let ()
- (unless (equal? x (quote constant))
- (raise *no-match*))
- result result* ...))
- ((match-pattern x (% record-matcher) result result* ...)
- (let ()
- (record-matcher x)
- result result* ...))
- ((match-pattern x (% record-matcher . patterns) result result* ...)
- (let ((x* (record-matcher x)))
- (match-pattern (map cdr (cdr x*)) patterns result result* ...)))
- ((match-pattern x () result* ...)
- (syntax-error "Unexpected pattern (). Use '() to match nil."))
- ((match-pattern x (pattern) result result* ...)
- (let ((y x))
- (unless (and (pair? y)
- (null? (cdr y)))
- (raise *no-match*))
- (match-pattern (car y) pattern result result* ...)))
- ((match-pattern x (pattern . rest) result result* ...)
- (let ((y x))
- (unless (pair? y)
- (raise *no-match*))
- (match-pattern (car y) pattern
- (match-pattern (cdr y) rest result result* ...))))
- ((match-pattern x identifier result result* ...)
- (let ((identifier x))
- result result* ...))))
-
-
- (define-syntax match
- (syntax-rules ()
- ((match x (arm ...))
- (guard (e ((no-match? e) (if #f #f)))
- (match-pattern x arm ...)))
- ((match x (arm ...) clause clause* ...)
- (let ((y x))
- (guard (e ((no-match? e)
- (match y clause clause* ...)))
- (match-pattern y arm ...))))))))